That was going to be my next option. Just not sure about effectiveness on soft scale. Dormant oil simply smothers insects. Not sure if that would work on waxy bodies like scale or mealys.. Using it on my citrus and avocado because they are just starting to bloom, and I don't want to kill bees. Of course there's always insectecidal soap, but that smells worse than Malathion, and also needs to be washed off.
It's a never ending battle.